SOURCE: At the Earth's Core by Edgar Rice Burroughs (All-Story Weekly, April 4-25, 1914)

DESCRIPTION:"His hand was reaching upward for the stern when I saw a sleek, sinuous body shoot from the depths below. The man saw it too, and the look of terror that overspread his face assured me that I need have no further concern as to him, for the fear of certain death was in his look. And then about him coiled the great, slimy folds of a hideous monster of that prehistoric deep—a mighty serpent of the sea, with fanged jaws, and darting forked tongue, with bulging eyes, and bony protuberances upon head and snout that formed short, stout horns..." (At the Earth's Core by Edgar Rice Burroughs)

NOTES: The hydrophidians riddle the seas of Pellucidar.

HISTORY: One of many dinosaurs found in Pellucidar. Burroughs usually gave them Pellucidarian names but not this one.

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